OpenLayers 3 - only call code on geolocation in IE11 if user allows it

Question

I have a geolocation control in OpenLayers 3. The problem is that when clicked in IE11, the user is prompted for permission to geolocate. I want to pan to the geolocation position if and after that permission is granted. I think what happens with my code now is that it tries to pan before permission has been granted:

geolocation.setTracking(true);
map.getView().setCenter(geolocation.getPosition());

How can I do this?

Answer 1

How about something like:

if(geolocation.position_ != null){
    map.getView().setCenter(geolocation.getPosition());
}

or:

if(geolocation.getPosition != 'undefined)